Turnbuckle



A. W."RAWLINS ETAL TURNBUCKLE Filed Nov. 4, 1943 A 7' TORNEYS elevation on the line 5 5 of'Fig. 1.

Patented Joly 9, 1.946

FICE" n TURNBUCKLE *l vto said Rawlins Application November 4, 1943, serial'No. 508,882

y 1` claim'. (Cyaan-6o) i This invention relates .to turn-buckles. The general object of the inventionv is to provide a turn-buckle the body of which, instead of being made of steel forgings, is constructed without forging of standard steel bars united by weldingmetal electrically deposited. The problem of so fabricating a turn-buckle body is difficult of solu-` tion within reasonable cost, because of the enormous strains that a turn-,buckle may be required to sustain in the uses to which it may be put.

The turn-buckle hereinafter described attains the above objects by the employment ofyconstructions and arrangements of parts which will be understood from the `following description taken in connection with the accompanying drawing in which Fig. 1 is a plan viewV of a turnbuckle yembodying the invention; Fig. 2 is an elevation of said turn-buckle; Fig, 3 is a sectional elevation on the line 3-3 of Fig. l, showing the welded structure; Fig. 4 is a sectional'elevation on the line 4-4 of Fig. 1; and Fig. 5 is a sectional Referring to the drawing, particularly to Figs. 1 and 2, it will be apparent that the body of the turn-buckle embodying the present invention consists of two axially-bored end portions, internally threaded respectively with right-hand and left# hand threads, and parallel reins connecting said end portions. In appearance, the body appears to be a homogeneous steel structure like a forging, but it is in fact a composite structure composed of four parts united by electrically deposited Welding-metal, thereby producing a strong composite construction.

The composite construction of the turn-buckle body will be apparent from Fig. 3 which shows in cross-section how the reins are united with the end portions f the body. From Fig. .3, it will be apparent that the end portions of the body comprise axially-bored and internally threaded cylindrical members I0 and I I, against the cylindrical surfaces of which the reins I2 and I 3 at their ends abut only on lines on diametrically opposite sides of the cylindrical members I0 and I I, thereby providing wedge-shaped spaces between the cylindrical members I0 and I I and the reins I2 and I3; the said cylindrical members I0 and II and the reins I2 and I3 being united by weldingmetal, indicated at IB, I'I, I8 and I 9, electrically welding metal lls the wedge-shaped spaces between's'aid end members and said reins to a plane tangentwith the surfaces of the latter; theend portions of` the bodyhave the appearance of a homogeneous steel structure, as above mentioned. A The cylindrical members I0 and II preferably are cut from a round steel bar, and the reins I2 and I3 are cut from a round steel bar having a diameter considerably less than the diameter of the cylindrical members I0 and I'I.l However, it is obvious that the cylindrical members Il) and rII and the reins`rI2 and I3 may be made from steel bars having cross-sections otherthan round,

provided their shapes are such that the rmembers -ing Wedge-shaped spaces between said end por.

tions and said reins adapted to receive the elec.-

. trically deposited Welding-metal which unites the members I0 and II and the reins l2 and I3 so as toA make a strong body structure. Incidentally,

lit may be stated that We have discovered that a Y y vstrong body structure does not result fromr the use of members and reins having rectilinear cross-sections, when said members and reins are e laid together Withtheir flatrsurfaces abutting and when they are united by electrically deposited Welding-metal applied to the corner spaces thus provided by the surfaces of. such members and reins.

As will be evident from the drawing, the turnbuckle therein shown has two stubs 2I and 22 having threaded portions 25 and 26 cooperating respectively with the threaded end portions of the body of the turn-buckle. Said stubs 2| and 22 are provided at their outside ends with formations facilitating their attachment to parts which are to be connected by the turn-buckle. As shown in thedrawing, the formation on the stub 2I having the threaded portion 25 consists of a jaw 21 which may be made of flat steel of the necessary size, bent at the middle and provided with a hole adapted to receive the outer end of the stub 2I; and, as shown in Figs. l, 2 and 4, electrically deposited welding-metal indicated at 29 and 30 may be employed to rigidly secure the jaw 21 to the threaded portion z5 of the stub 2|. A boit 3| e having a head 32 and a nut 33 locked in place by a cotter pin 34 are shown in the drawing cooperating with the jaw in a usual manner. The other stub 22 is shown as provided `at its outside end with an eye 35 bent to the shape shown and preferably given a closed effect by electrically deposited welding-metal shown at 36. It will of course be understood that the stubs 2| and 22 side of the body of a turn-buckle, and to clamp such nuts against the outside of the ends of the body of the turn-buckle after the turn-buckle has been set to a desired position, in the hope thereby of preventing loosening of the turn-buckle. EX-

perience has shown, however, that lock-nuts so' located are not reliable, for the reason that they become loose and ineiective when the turnbuckle is subjected to vibration and turning strains on the stubs, since under such circumstances the stubs may unscrew and carry the lockenuts away from abutting vrelation to the end of the turn-'buckle body, thereby rendering the lock-nuts ineective. Moreover, reven 'when locknuts are applied to 'the threaded portions of the stubs fwithin the body of the turn-buckle and are clamped yagainst the inside of the ends of the body of the turn-buckle such-lockenuts may be ineffective in preventing loosening of the turn- -buckle under Ysevere *conditions vof vibration and twisting lto `which the turn-buckle may be vsubjected; since in such ycases the threaded portions of the Astubs `may rotate in the nut and in thek body of the turn-buckle as though the nut and v body were one part.

In our effortsto solvesatisfactorily the problem 'of `securing the parts of the turn-buckle in any 'position to which they may be adjusted in use,

we havefprovided the locking means shown in the Vdrawing and `about to be'described which'is highly Isatisfactory and positive in its action.` `Our lock-ing means comprises threaded sleeves 40 and '4l-'I which are' internally provided with right-hand andf'left-hand threads adapted to `cooperate re-r spectively with the threaded portions 25 and 26 ofV the stubs 2| and, 22; such sleeves 40 and '4I 4 being provided with a plurality of holes as shown. These holes not only facilitate rotation of the sleeves 4l] and 4| into snug engagement with the inside faces of the end portions of the body of the turn-buckle, but are also adapted to receive pins 44, preferably of soft metal. After the turnbuckle has lbeen adjusted to the position in which it exerts the desired tension on parts to which it may be attached, the threaded sleeves 40 and 4I may be set up snugly against the inside faces of the ends of the body of the turn-buckle, with any suitable tools, and the pins 44 may'then be driven into the holes and into engagement with the Fthreaded portions 25 "and 26 of the stubs 2l and 22. Then, if loosening rotation of the stubs 2| and 22 tends to occur due to vibration and twisting strains, the' threaded sleeves 40 and 4| are carried by the threaded portions 25 and 26 of the stubs into increasingly.v snug engagement with4 forging from 'standard steel forms.

What is claimed is:

A turn-'buckle body composed of two cylindrical axially-bored and internally oppositely-threaded end members which are rspaced apart in axial relation to one another, cylindrical reins axially parallel with the threaded openings in said cylindrical end members and with the cylindrical surfaces of the end portions of said reins abutting on lines the cylindrical surfaces of said end members on opposite 'sides thereof, and welding metal 'united with said end members and said reins and filling the wedge-shapedr spaces between the cylindrical surfaces thereof vto a plane tangent with said cylindrical surfaces.

ALBERT W. RAWLINS. WILLIAM J. KUPEC. 

